OpenAI: GPT-5.6 Terra vs OpenAI o4-mini
Compare OpenAI: GPT-5.6 Terra and OpenAI o4-mini, both from OpenAI, tested across 53 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Terra
OpenAI o4-miniRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Terra has the edge — bigger model tier, newer, bigger context window.
OpenAI o4-mini is 3.4x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
OpenAI o4-mini
Input
$1.10
2.3× cheaper
Output
$4.40
3.4× cheaper
OpenAI o4-mini is cheaper on both — 2.3× input, 3.4× output
Writing DNA
Style Comparison
Similarity
51%
OpenAI: GPT-5.6 Terra uses 275.5x more bold
OpenAI: GPT-5.6 Terra
OpenAI o4-mini
57%Vocabulary73%
18wSentence Length15w
0.85Hedging0.18
2.8Bold0.0
4.6Lists2.1
0.00Emoji0.00
1.12Headings0.00
0.06Transitions0.02
Based on 27 + 10 text responses
Research
What we learned reading every model
FAQ
